Shamelessly, mine has to be Aranea
Now I would normally start saying "she did nothing wrong," but uh... we know what she did, I'll cut her slack, she did what she thought was right, which wasn't, and ended horribly. However, I do not believe that she should have gotten sidelined like that, or any of the pre-scratch trolls for that matter.
Anyways, yadayada, Aranea was my first crush, just wish she didn't go out like THAT